Giúp mình lựa chọn đáp án và giải thích hộ mình nhé! CẢM ƠNNNNNNNNN
1. The number of participants in the survey ____ 250 students for Oxford University.
A. are B. was
C. were D. have been
2. Many people even wonder these days ______.
A. what marriage is B. what is marriage
C. what marriage was D. what was marriage
1. B
2.A
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